The offline event of the Window interface is fired when the browser has lost access to the network and the value of Navigator.onLine switches to false.
Window: offline event
Syntax
Use the event name in methods like addEventListener(), or set an event handler property.
addEventListener('offline', event => { }); onoffline = event => { };
Event type
A generic Event.
Event handler aliases
In addition to the Window interface, the event handler property onoffline is also available on the following targets:
Examples
// addEventListener version window.addEventListener('offline', (event) => { console.log("The network connection has been lost."); }); // onoffline version window.onoffline = (event) => { console.log("The network connection has been lost."); };
Specifications
| Specification |
|---|
| HTML Standard # event-offline |
Browser compatibility
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
offline_event |
3
|
12
|
9
|
9
|
15
|
4
|
≤37
|
18
|
9
|
14
|
3
|
1.0
|
See also
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/Window/offline_event
